Title :
Millimeter wave direct quadrature converter integrated with antenna for broad-band wireless communications
Author :
Ji-Yong Park ; Seong-Sik Jeon ; Yuanxun Wang ; Itoh, T.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A compact quadrature modulator/demodulator integrated with a 40 GHz patch antenna for millimeter wave wireless applications is proposed. Anti-parallel diode sub-harmonic mixers are constructed for broad-band direct quadrature conversion. Overall phase and amplitude imbalance between the mixer I and Q output channels are less than 1.2/spl deg/ and 1 dB respectively. An average conversion loss of mixers of -14.6 dB is achieved in the frequency range from 39.75 GHz to 40.25 GHz. A communication link is built based on a pair of the proposed front-ends. Data transmission at up to 1 Gb/s data rate for QPSK modulation is successfully demonstrated.
Keywords :
microstrip antennas; microwave links; millimetre wave antennas; millimetre wave frequency convertors; millimetre wave mixers; quadrature phase shift keying; -14.6 dB; 1 Gbit/s; 40 GHz; QPSK modulation; anti-parallel diode sub-harmonic mixer; broadband wireless communication; conversion loss; data transmission; front-end system; millimeter-wave direct quadrature converter; patch antenna; quadrature modulator/demodulator; Broadband communication; Circuits; Demodulation; Diodes; Frequency conversion; Millimeter wave communication; Millimeter wave measurements; Mixers; Patch antennas; Radio frequency;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011896
